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Method for removing chloride impurities from rhodochrosite and eluent adopted by same

A chloride and rhodochrosite technology is applied in the field of removing chloride impurities from rhodochrosite ore and the eluent used, which can solve problems such as affecting the quality of electrolytic manganese and normal production, consuming large chemical reagents, and complex methods. problems, to achieve the effect of easy industrialization, green, safe and pollution-free environment, and simple operation.

Inactive Publication Date: 2013-09-04
青海华信环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of preparing electrolytic manganese, due to the use of acidic anolyte to dissolve rhodochrosite ore, the concentration of chloride ions reaches 6g / L or even higher due to repeated enrichment, resulting in the release of a large amount of chlorine gas during electrolytic manganese, which affects the production of electrolytic manganese. Quality and normal production, so the dechlorination step must be carried out before electrolysis
However, removing chlorine ions in the electrolyte requires a large amount of chemical reagents, and may introduce various impurity ions into the electrolyte, and the method is complicated and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The natural rhodochrosite ore produced in the southern Xinjiang area purchased by Qinghai Huaxin Smelting Co., Ltd. is used as raw material. The main component of the raw material is manganese carbonate, and the content of chloride ion is 0.92%. The existence of chloride impurities is chlorination Manganese, barium chloride, calcium chloride, and chloride impurities are removed from rhodochrosite ore by the following steps:

[0024] 1. Weigh three parts of 5g natural rhodochrosite ore, respectively configure a mixed solution of 0.5wt% ammonium sulfate and 0.01M ammonia water, a mixed solution of 0.5 wt% ammonium carbonate and 0.01M ammonia water, a 0.01M ammonia solution and deionized water as washing dehydration.

[0025] 2. Wash the above three ore samples with the above eluent respectively. Except for different eluents, the other conditions are the same: with a solid-liquid ratio of 1:5 (that is, rhodochrosite ore powder (100 mesh) and eluent Mass ratio, the same be...

Embodiment 2

[0028] With rhodochrosite ore as raw material, the content of chlorine in the raw material is 0.92%, and chlorine is removed from manganese sulfate sample by the following steps:

[0029] 1. Weigh two parts of 5g natural rhodochrosite ore, and configure a mixed solution of 0.5wt% ammonium sulfate and 0.01M ammonia water as the eluent.

[0030] 2. Wash the above two ore samples with the above solution at room temperature at a solid-to-liquid ratio of 1:5. Condition No. 1 is: stir for 1 hour and filter, then use the eluent of the same condition to stir for another 1 hour and filter; Condition No. 2 For: Stir for 2h, filter.

[0031] 3. Using the Mohr method to measure the dechlorinated rhodochrosite ore powder, the chloride ion content accounted for 0.161% (No. 1) and 0.0496% (No. 2) of the ore sample in turn.

[0032] From the experimental results, it can be seen that stirring at room temperature for 2 hours has the best washing effect.

Embodiment 3

[0034] With the rhodochrosite ore used in the electrolytic manganese system of a company in Guangxi as raw material, the main component in the raw material is manganese carbonate, wherein the content of chlorine is 1.07%, and the chlorine is removed from the manganese sulfate sample by the following steps:

[0035] 1. Weigh four parts of 5g rhodochrosite ore with a fineness of 40 mesh, 60 mesh, 120 mesh and 200 mesh respectively, and prepare a mixed solution of 0.5% ammonium sulfate and 0.01M ammonia water as the eluent.

[0036] 2. Stir and wash the above mineral samples with the above solution at room temperature for 2 hours at a solid-to-liquid ratio of 1:5, and filter.

[0037] 3. Repeat the above two steps several times, combine the filtrate, heat and concentrate. (A proper amount of hydrochloric acid can be added to increase the solubility)

[0038] 4. Using the Mohr method to measure the rhodochrosite ore powder after dechlorination, the chloride ion content in the rho...

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Abstract

The invention discloses an eluent for removing chloride impurities from rhodochrosite. The eluent is a mixed solution of ammonium sulfate and ammonia water, wherein the mass of the ammonium sulfate accounts for 0.2-0.6% of the total mass of the mixed solution; and the concentration of the ammonia water is 0.01-0.05M. A natural ore sample is eluted and filtered by use of the eluent to obtain filtrate and an ore sample after removing chloride impurities. The dechlorination method provided by the invention is simple to operate, only requires normal-temperature stirring and filtration, and is easy to implement industrially; the eluent can prevent the dissolution loss of manganese ions; and since the components in the eluent can form precipitates with barium ions and calcium ions contained in rhodochrosite, the washing effect is better.

Description

technical field [0001] The present invention relates to an eluent for chlorine removal and a method for removing chloride impurities from rhodochrosite ore. Background technique [0002] At present, in the process of preparing electrolytic manganese, due to the use of acidic anolyte to dissolve rhodochrosite ore, the concentration of chloride ions reaches 6g / L or even higher due to repeated enrichment, resulting in the release of a large amount of chlorine gas during electrolytic manganese, which affects the production of electrolytic manganese. Quality and normal production, so the dechlorination step must be carried out before electrolysis. However, removing chlorine ions in the electrolyte requires a large amount of chemical reagents, and may introduce various impurity ions into the electrolyte, and the method is complicated and the cost is high. However, the method is to dissolve the ore after simply washing the ore sample, and the treatment method is simple and easy to...

Claims

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Application Information

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IPC IPC(8): C22B1/00
Inventor 杨瑛翟红伟曹闫贵
Owner 青海华信环保科技有限公司
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